Royal Purple Duralec Ultra Diesel 15W-40 CK-4 Motor Oil - 1 Gallon

Royal Purple Duralec Ultra Diesel 15W-40 CK-4 Motor Oil - 1 Gallon

Marsoni

M251S

$110.97

Get it in 3 business days with 1 day shipping. Friday, May 29

Royal Purple Duralec Ultra Diesel 15W-40 CK-4 Motor Oil - 1 GallonSKU: 80561 UPC: 641330805615 Royal Purple Duralec Ultra Diesel 15W 40 CK 4 Motor Oil 1 Gallon: Supreme Powerhouse Lubrication for Demanding Diesel Workloads The foremost selection for unmatched resilience in tough operational settings. This cutting edge full synthetic lubricant eclipses traditional petroleum based oils and peer synthetics from brands like Chevron or Castrol through its innovative molecular structure, yielding heightened power

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I used this to remove the Poli Glow previously applied about two years ago to my fiberglass trailer. It seems to do a slightly better job of removing the PG than the other Prep solution, but I didn't do a side-to-side comparison. And the surface never achieved a completely uniform appearance after the stripping, although this may not be possible because of differences in the remaining gel coat surfaces. I also completely washed the trailer with soap & water after using this stripping product. I didn't do this the previous time and thought some of the prep compound may have been left on the surface resulting in a shorter life. Time will tell. Note: it is still "work" to strip the trailer, this is not a "magic" solution, thus the 4-star rating. But it, along with the Poli Glow, was the only way to get my oxidized trailer to look shiny. All the other products tried failed to bring a glow. I will purchase it again when redoing the trailer.

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Reviewed in the United States on March 5, 2017

Verified Purchase

Raymond Verdelotti

Los Angeles, US

★★★★★ 5

Stripper

I love this stuff. Been using it for years and never disappoint. Use all there products.

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Reviewed in the United States on October 22, 2025

Verified Purchase

Waterdog

Lowell, US

★★★★★ 1

Does not work.

Do not use this product. It has left my RV all splotchy. It looks terrible. I am trying to find something that will work. I wish I had never used Poly glow to start with.

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Reviewed in the United States on June 9, 2022

Verified Purchase

Lowell, US

★★★★★ 3

Not happy

Faded and peeling after a year

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Reviewed in the United States on July 31, 2025